import React, { useMemo, useState } from "react";
import type { Color } from "antd/es/color-picker";
import { Card, ColorPicker, Form, Input, InputNumber, Slider, Space, Typography, Watermark } from "antd";
import illustration from "@/assets/images/illustration.png";

const { Paragraph } = Typography;

interface WatermarkConfig {
  content: string;
  color: string | Color;
  fontSize: number;
  zIndex: number;
  rotate: number;
  gap: [number, number];
  offset?: [number, number];
}

const WatermarkPage: React.FC = () => {
  const [form] = Form.useForm();
  const [config, setConfig] = useState<WatermarkConfig>({
    content: "EU Admin",
    color: "rgba(0, 0, 0, 0.15)",
    fontSize: 16,
    zIndex: 11,
    rotate: -22,
    gap: [100, 100],
    offset: undefined
  });
  const { content, color, fontSize, zIndex, rotate, gap, offset } = config;

  const watermarkProps = useMemo(
    () => ({
      content,
      font: {
        color: typeof color === "string" ? color : color.toRgbString(),
        fontSize
      },
      zIndex,
      rotate,
      gap,
      offset
    }),
    [config]
  );

  return (
    <Card bodyStyle={{ display: "flex" }}>
      <Watermark {...watermarkProps}>
        <Typography>
          <Paragraph>
            The light-speed iteration of the digital world makes products more complex. However, human consciousness and attention
            resources are limited. Facing this design contradiction, the pursuit of natural interaction will be the consistent
            direction of Ant Design.
          </Paragraph>
          <Paragraph>
            Natural user cognition: According to cognitive psychology, about 80% of external information is obtained through
            visual channels. The most important visual elements in the interface design, including layout, colors, illustrations,
            icons, etc., should fully absorb the laws of nature, thereby reducing the user&apos;s cognitive cost and bringing
            authentic and smooth feelings. In some scenarios, opportunely adding other sensory channels such as hearing, touch can
            create a richer and more natural product experience.
          </Paragraph>
          <Paragraph>
            Natural user behavior: In the interaction with the system, the designer should fully understand the relationship
            between users, system roles, and task objectives, and also contextually organize system functions and services. At the
            same time, a series of methods such as behavior analysis, artificial intelligence and sensors could be applied to
            assist users to make effective decisions and reduce extra operations of users, to save users&apos; mental and physical
            resources and make human-computer interaction more natural.
          </Paragraph>
        </Typography>
        <img
          style={{
            zIndex: 10,
            width: "100%",
            maxWidth: 800,
            position: "relative"
          }}
          src={illustration}
          alt="示例图片"
        />
      </Watermark>
      <Form
        style={{
          width: 280,
          flexShrink: 0,
          borderLeft: "1px solid var(--hooks-colorBorderSecondary)",
          paddingLeft: 20,
          marginLeft: 20
        }}
        form={form}
        layout="vertical"
        initialValues={config}
        onValuesChange={(_, values) => {
          setConfig(values);
        }}
      >
        <Form.Item name="content" label="Content">
          <Input placeholder="请输入" />
        </Form.Item>
        <Form.Item name="color" label="Color">
          <ColorPicker />
        </Form.Item>
        <Form.Item name="fontSize" label="FontSize">
          <Slider step={1} min={1} max={100} />
        </Form.Item>
        <Form.Item name="zIndex" label="zIndex">
          <Slider step={1} min={0} max={100} />
        </Form.Item>
        <Form.Item name="rotate" label="Rotate">
          <Slider step={1} min={-180} max={180} />
        </Form.Item>
        <Form.Item label="Gap" style={{ marginBottom: 0 }}>
          <Space style={{ display: "flex" }} align="baseline">
            <Form.Item name={["gap", 0]}>
              <InputNumber placeholder="gapX" style={{ width: "100%" }} />
            </Form.Item>
            <Form.Item name={["gap", 1]}>
              <InputNumber placeholder="gapY" style={{ width: "100%" }} />
            </Form.Item>
          </Space>
        </Form.Item>
        <Form.Item label="Offset" style={{ marginBottom: 0 }}>
          <Space style={{ display: "flex" }} align="baseline">
            <Form.Item name={["offset", 0]}>
              <InputNumber placeholder="offsetLeft" style={{ width: "100%" }} />
            </Form.Item>
            <Form.Item name={["offset", 1]}>
              <InputNumber placeholder="offsetTop" style={{ width: "100%" }} />
            </Form.Item>
          </Space>
        </Form.Item>
      </Form>
    </Card>
  );
};

export default WatermarkPage;
